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Title: Dynamics of Breakdown in a Low-Pressure Argon–Mercury Mixture in a Long Discharge Tube

Abstract

Breakdown dynamics in the course of glow discharge ignition in a long discharge tube (80 cm in length and 25 mm in diameter) filled with argon at a pressure of 3–4 Torr and mercury vapor at room temperature was studied experimentally. Rectangular voltage pulses with amplitudes from 1 to 2.5 kV were applied to the tube anode, the cathode being grounded. Complex electrical and optical measurements of the breakdown dynamics were carried out. Breakdown begins with a primary discharge between the anode and the tube wall. In this stage, a jump in the anode current and a sharp decrease in the anode voltage are observed and prebreakdown ionization wave arises near the anode. The cathode current appears only after the ionization wave reaches the cathode. The wave propagation velocity was measured at different points along the tube axis. The wave emission spectrum contains Hg, Ar, and Ar{sup +} lines. The intensities of these lines measured at a fixed point exhibit very different time behaviors. The effect of the tube shielding on the breakdown characteristics was examined. It is found that, at a sufficiently narrow gap between the shield and the tube, this effect can be substantial.

Authors:
; ; ;  [1]
  1. St. Petersburg State University (Russian Federation)
Publication Date:
OSTI Identifier:
22763289
Resource Type:
Journal Article
Journal Name:
Plasma Physics Reports
Additional Journal Information:
Journal Volume: 44; Journal Issue: 3; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-780X
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANODES; ARGON; ARGON IONS; BREAKDOWN; CATHODES; ELECTRIC POTENTIAL; EMISSION SPECTRA; GLOW DISCHARGES; IONIZATION; MERCURY; WAVE PROPAGATION

Citation Formats

Kalinin, S. A., Meshchanov, A. V., Shishpanov, A. I., and Ionikh, Yu. Z., E-mail: y.ionikh@spbu.ru. Dynamics of Breakdown in a Low-Pressure Argon–Mercury Mixture in a Long Discharge Tube. United States: N. p., 2018. Web. doi:10.1134/S1063780X18030054.
Kalinin, S. A., Meshchanov, A. V., Shishpanov, A. I., & Ionikh, Yu. Z., E-mail: y.ionikh@spbu.ru. Dynamics of Breakdown in a Low-Pressure Argon–Mercury Mixture in a Long Discharge Tube. United States. doi:10.1134/S1063780X18030054.
Kalinin, S. A., Meshchanov, A. V., Shishpanov, A. I., and Ionikh, Yu. Z., E-mail: y.ionikh@spbu.ru. Thu . "Dynamics of Breakdown in a Low-Pressure Argon–Mercury Mixture in a Long Discharge Tube". United States. doi:10.1134/S1063780X18030054.
@article{osti_22763289,
title = {Dynamics of Breakdown in a Low-Pressure Argon–Mercury Mixture in a Long Discharge Tube},
author = {Kalinin, S. A. and Meshchanov, A. V. and Shishpanov, A. I. and Ionikh, Yu. Z., E-mail: y.ionikh@spbu.ru},
abstractNote = {Breakdown dynamics in the course of glow discharge ignition in a long discharge tube (80 cm in length and 25 mm in diameter) filled with argon at a pressure of 3–4 Torr and mercury vapor at room temperature was studied experimentally. Rectangular voltage pulses with amplitudes from 1 to 2.5 kV were applied to the tube anode, the cathode being grounded. Complex electrical and optical measurements of the breakdown dynamics were carried out. Breakdown begins with a primary discharge between the anode and the tube wall. In this stage, a jump in the anode current and a sharp decrease in the anode voltage are observed and prebreakdown ionization wave arises near the anode. The cathode current appears only after the ionization wave reaches the cathode. The wave propagation velocity was measured at different points along the tube axis. The wave emission spectrum contains Hg, Ar, and Ar{sup +} lines. The intensities of these lines measured at a fixed point exhibit very different time behaviors. The effect of the tube shielding on the breakdown characteristics was examined. It is found that, at a sufficiently narrow gap between the shield and the tube, this effect can be substantial.},
doi = {10.1134/S1063780X18030054},
journal = {Plasma Physics Reports},
issn = {1063-780X},
number = 3,
volume = 44,
place = {United States},
year = {2018},
month = {3}
}